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Finding the Fourth Proportional to 727.57, 1,091.36 and 545.93

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Solution

The fourth proportional to 727.57, 1,091.36 and 545.93 is: 818.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.57 : 1,091.36 = 545.93 : x
  2. Step 2: Convert to fraction form
    727.57/1,091.36 = 545.93/x
  3. Step 3: Cross multiply
    727.57x = 1,091.36 × 545.93
  4. Step 4: Simplify right side
    727.57x = 595,806.16
  5. Step 5: Solve for x
    x = 595,806.16/727.57
  6. Step 6: Final answer
    x = 818.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.